发明授权
- 专利标题: Fuse state indicator
- 专利标题(中): 保险丝状态指示灯
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申请号: US09537518申请日: 2000-03-29
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公开(公告)号: US06566996B1公开(公告)日: 2003-05-20
- 发明人: Robert Stephen Douglass , Matthew Rain Darr , Michael Craig Henricks
- 申请人: Robert Stephen Douglass , Matthew Rain Darr , Michael Craig Henricks
- 主分类号: H01H8530
- IPC分类号: H01H8530
摘要:
A fuse state indicator includes a fuse casing having a transparent lens, a combustible substance disposed adjacent the lens, and a base layer disposed adjacent the combustible substance and having a contrasting color relative to the combustible substance. A secondary fuse indicating circuit is electrically connected to a main fuse circuit in parallel with a main fuse link, and includes a secondary fuse wire link which is disposed adjacent the combustible substance. Heat created upon vaporization of the secondary fuse link ignites the combustible substance and reveals the base layer through the lens after combustion, thereby indicating a state of the fuse as operable or inoperable by the color visible through the lens. Combustion may be assisted with an energetic chemical compound applied to secondary fuse wire link and combustible substance.
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